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A sic MOSFET gradient level drive circuit and method suitable for DC solid-state power controllers

A level drive and drive circuit technology, which is applied in the field of SiCMOSFET gradual level drive circuits, can solve the problems of cumbersome implementation and poor operability, and achieve the effects of simplifying the adjustment process, suppressing voltage spikes, and overcoming complex structures

Active Publication Date: 2018-12-07
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is necessary to adjust the capacitance according to the size of the added inductive load, the engineering operability is poor, and the implementation is more cumbersome

Method used

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  • A sic MOSFET gradient level drive circuit and method suitable for DC solid-state power controllers
  • A sic MOSFET gradient level drive circuit and method suitable for DC solid-state power controllers
  • A sic MOSFET gradient level drive circuit and method suitable for DC solid-state power controllers

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Embodiment Construction

[0032] The present invention will be further explained below in conjunction with the accompanying drawings.

[0033] Such as Figure 4 Shown, a kind of SiC MOSFET (silicon carbide metal oxide semiconductor field effect transistor) gradient level drive circuit suitable for DC solid-state power controller is characterized in that, comprises drive circuit, power circuit, control circuit and communication circuit; Power The switch MOSFET and its gradually changing level drive control circuit realize the turn-on and turn-off control of the main power circuit. If a short-circuit fault or an over-current fault occurs and the fault shutdown condition is met, the drive circuit sends a gradually changing level signal to turn off the power tube to realize short-circuit protection; otherwise, the delay protection of the circuit is realized according to the inverse time limit curve. According to the status of SSPC and the information from the current detection part, it provides load statu...

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Abstract

The invention discloses a SiC MOSFET gradual-change level driving circuit and method applied to a direct current solid state power controller. The method comprises the following steps: after passing a driving signal output by a driving circuit through an inverting circuit, outputting a first operational amplifier output signal; passing the first operational amplifier output signal through a trapezoidal wave generation circuit, carrying out integration on the first operational amplifier output signal and outputting a second operational amplifier output signal; carrying out in-phase proportion amplification on the driving signal via an in-phase proportion operational circuit and outputting a sixth connection signal; and carrying out addition calculation on the second operational amplifier output signal and the sixth connection signal, and outputting a gradual-change level circuit output signal, wherein the signal is the gradual-change level driving signal. According to the SiC MOSFET gradual-change level driving circuit and method disclosed by the invention, compared with the prior art, the voltage spike when a direct current SSPC inductive load is turned off can be effectively inhibited, the load compatibility of the direct current SSPC is improved, and the shortages of complex structure, complex engineering realization and the like are overcome.

Description

technical field [0001] The invention relates to the fields of electronic technology and electrical technology, in particular to a SiC MOSFET gradient level drive circuit and method suitable for DC solid-state power controllers. Background technique [0002] Solid State Power Controller (SSPC) can replace the traditional electromagnetic circuit breaker, and realize the functions of on-off control and over-current protection of the load by controlling the power switch tube, which can be applied to vehicles, ships or aerospace, etc. field. The digital solid-state power controller communicates with the host computer through microcontrollers such as FPGA or DSP to realize remote control of the solid-state power controller and improve the intelligent working ability of the solid-state power controller. [0003] The DC solid-state power controller is applied to the DC power distribution system. By controlling the semiconductor switch tube, it controls the cut-in and cut-off of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K17/082H02H9/02
CPCH02H9/02H03K17/0822H03K2217/0081
Inventor 朱梓悦秦海鸿聂新徐华娟
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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